Because it is always leveled and is more sensitive and Banana Blitz was a launch title so they have had a lot of time to fix things, like removing the jump?
I think the poor response it has gotten so far has been bullshit. From what I have heard, the music is kind of lame, but the basic gameplay improves on the series in a lot of ways. You can pause to scroll around the environment on easier modes, there is somewhat of a tornado coming off from the end of the level that you can see from anywhere so you know where to go, lots of stuff.
But they removed YanYan and Doctor! They were great characters! :x